阻性负载交流故障电弧放电能量研究

Study on AC fault arc discharge energy under resistive load

为计算阻性负载电路交流故障电弧放电能量,搭建低压交流故障电弧试验平台,在不同电阻大小条件下,采集电弧电压与电流,并分析交流电弧特性,利用能量守恒定律计算半工频周期电弧放电能量,讨论电路电阻与半工频周期电弧电气参量和放电能量大小的关系。研究表明:随电路电阻变大,单位电弧的等效电阻变大、有效电流变小、放电能量变小;稳定燃弧单位电弧有效电流大于不稳定燃弧单位电弧有效电流,其等效电阻和放电能量相反。最后得出电路电阻与单位电弧放电能量的函数关系式,从而评估其引燃易燃易爆气体或液体蒸气的能力。

The experimental platform for low-voltage AC series arc was made to collect the arc voltage and current under different resistance sizes.The primary objective of this platform has been to analyze the AC arc characteristics and the energy of semi-power frequency period arc discharge was calculated by using the law of conservation of energy,and the relationship between circuit resistance and semi-power frequency period arc electrical parameters and energy size was discussed.The results of the experiment indicate that the effective resistance of the unit arc became larger as the circuit resistance became larger,however,the effective current and the arc energy became smaller.The effective current of the stable arc per unit arc was greater than the effective current of the unstable arc per unit arc,and its effective resistance and arc energy were opposite.Ultimately,a functional relationship between the circuit resistance and the discharge energy of the unit arc was obtained,which was used to evaluate its ability to ignite flammable and explosive gases or vapors.